Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
12
Directory of Open Access Journals: DOAJ Articles
3
Arctic Portal Library
2
University of Alaska: ScholarWorks@UA
2
Copernicus Publications: E-Journals
1
Digital Repository @ Iowa State University
1
MDPI Open Access Publishing
1
National Institute of Polar Research Repository, Japan
1
Niedersächsisches Online-Archiv NOA
1
University of Calgary Journal Hosting
1
Unknown
1